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單項(xiàng)選擇題

Current measuring instruments must always be connected in （）

A.series with a circuit
B.parallel with a circuit
C.series-parallel with a circuit
D.delta with the shunt

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單項(xiàng)選擇題

The primary function of an electric motor is to （）

A.develop torque
B.generate high voltages
C.produce a magnetic field
D.generate high electrical resistance

單項(xiàng)選擇題

The power factor at which a paralleled AC generator operates is usually adjusted by the （）.

A.connected load
B.prime mover speed
C.field excitation
D.generators rated voltage

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